みんなでわたる。
Free · play online in your browser, no download
Run through +5 and ×2 gates, grow a crowd and throw it at the boss. A one-finger hyper-casual game for the browser, its code written almost entirely by Claude Code.
Official site vannangames.com, verified Nov 3, 2026. Play address linked from the game's page on VANNAN GAMES (vannangames.com), the developer's own site, which the developer's Zenn article links.
Where to play
Every platform this game is on. Links are checked against official sources; we never host or mirror games.
- Play free — official siteBrowserReleasedFree
Runs in a desktop or mobile browser. No download.
Browser (no download) · Mobile · Official link verified Nov 3, 2026.
About みんなでわたる。
みんなでわたる。 is a free hyper-casual game for the browser, in Japanese. The developer calls it “that type of game” with the “+5” and “×2” gates you often see in ads, set at the same crossing as the novel 四十秒の交差点: where the one-button game よんじゅうびょう。 has you survive forty seconds alone, here you push across in a crowd. Each stage is a run of about 30 seconds followed by a boss fight. You only drag left and right; the crowd fires forward on its own. Pigeons and bicycles on the way carry health numbers: shoot them down or pay that many members when you hit them. The crowd's size is its health and also the weight of each shot, and enemy numbers grow with it, so what decides whether you can clear the road is the fire rate, power and number of shot columns you raise at blue gates and in three-way upgrade choices after mid-bosses. After the first boss you choose what to fire (paper planes, balls or soap bubbles), and a dog and an umbrella can come along as companions. Five bosses (a runaway bicycle, the pigeon king, a jogger squad leader, a rain cloud and a big bus) return at higher levels; they sway from side to side, so you have to line the crowd up in front of them to land its charge, and shots and companions can take only 30% of a boss's health. Coins stay when you lose and buy permanent upgrades in a shop, and you can retry a stage from where you entered it. The crowd caps at 99,999,999, with titles by size; the developer suggests aiming for a million. Per the developer, kawaiy, the code is almost all written by Claude Code; the illustrations were generated with ChatGPT and the music with Suno. Plain HTML, CSS and JavaScript with no framework. Free in desktop and phone browsers.
How it was built
VerifiedIn a Zenn article (23 Aug 2026) about building the eight-game VANNAN GAMES site in 34 days, the developer lists the division of work as “Claude : コード、ドキュメント、シナリオの下書き、レビュー” (Claude: code, documents, scenario drafts, reviews) and writes “コードはほぼClaude Codeに書かせています。” (I have Claude Code write almost all of the code.) Check and generator scripts run from a Claude Code Stop hook after every agent reply and again on GitHub Actions. The developer notes that a balance simulator with automatic play gives the numbers, but whether a game is fun had to be judged by playing it.
- DeveloperA production note on the site (17 Sep 2026) opens: “このサイトは、コードを書く作業の大半をAIに頼んで作っています。” (This site is built by leaving most of the code writing to AI.) — VANNAN GAMES
Generated the illustrations; the game's page credits “イラスト：ChatGPTで生成” (illustrations generated with ChatGPT).
Plain HTML, CSS and JavaScript with no framework, served as static files from Tencent Cloud EdgeOne Pages; progress is saved in the browser's localStorage. Claude Code writes almost all of the code under checks run by a Stop hook; ChatGPT generates the illustrations and Suno the music. The game was reworked twice after release: on 12 Aug 2026 the gates were put in a fixed order after the developer measured results for the same always-correct play varying more than ten-thousand-fold, and on 11 Oct 2026 it became a shooting game with enemy numbers, mid-bosses and a shop.
- Engine / framework
- None (vanilla JavaScript)
- Languages
- JavaScript
- Team size
- 1 (solo)Developer ReportedVANNAN GAMES
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
“コードはほぼClaude Codeに書かせています。”- Eight browser games in 34 days: Claude, ChatGPT and Suno, and what could not be handed off (Zenn, Japanese)
- Game page on VANNAN GAMES (Japanese)
Verification notes: AI use and the workflow come from the developer's Zenn article (23 Aug 2026, 02:03 JST), re-read through Zenn's API on 8 Nov 2026; it links vannangames.com. The article covers the whole site (eight games on 23 Aug 2026) and does not name this game, so the Claude Code statement is applied to each of its games. A production note on the site (17 Sep 2026) also says most of the code writing is left to AI. Rules, bosses and credits (企画・開発：kawaiy; illustrations generated with ChatGPT, BGM with Suno) come from the game's page, read on 8 Nov 2026. Release date: the site's updates log dates the release 26 Jul 2026 (the site's fourth game); the game's page shows 公開日 30 Jul 2026, which is when the log says introduction pages were added for this and two other games, and last updated 11 Oct 2026. At launch the crowd cap was 9,999,999 per the log; the page now says 99,999,999. The ad-style gate format is the developer's own description; no specific game is named. The site's operator page names kawaiy (個人) as the operator. The English title is our translation; there is no official English title. The game's script contains no AI service addresses; the site loads Google Analytics. The Japanese interface was observed (lang="ja"); no other language option was found. The game was not played.
Development history
Released on VANNAN GAMES as the site's fourth game.
DeveloperVANNAN GAMESGates rebuilt so results depend on skill rather than luck: fixed gate order, a ×3 gamble, and the ÷3 gate removed.
DeveloperVANNAN GAMESThe developer's Zenn article describes building the eight-game site with Claude Code writing almost all of the code.
DeveloperZenn (kawaiy)Reworked into a shooting game: the crowd fires automatically, enemies carry numbers, and mid-bosses, companions and a shop are added.
DeveloperVANNAN GAMES
Game performance
Each figure measures something different — concurrent players, owners, downloads and sales are never interchangeable and are never added together. Labels show where each number comes from.
Browser (official site)
Free in modern desktop and phone browsers, with no install or account; the stage reached and crowd size are saved in the browser and not sent anywhere, per the game's page. The site accepts optional support through OFUSE.
No public metrics recorded for this listing.
Not publicly available: Concurrent players (site), Monthly revenue, Gross revenue.
Sales & revenue (all platforms)
Browser game — there are no downloads to count.
Reviews & rankings
Not yet reviewed by our editors.
Not currently ranked.
Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| 34日でブラウザゲーム8本のサイトを立てた。Claude・ChatGPT・Sunoの分担と、丸投げできなかったもの Zenn (kawaiy) · Japanese | Devlog | Aug 23, 2026 | Nov 3, 2026 |
| みんなでわたる。｜大群で交差点をわたるハイパーカジュアル｜VANNAN GAMES VANNAN GAMES · Japanese | Official site | Jul 30, 2026 | Nov 3, 2026 |
| 更新情報｜VANNAN GAMES VANNAN GAMES · Japanese | Official site | Not confirmed | Nov 3, 2026 |
| ルールを決めた8日後に、自分でそれを破った——AIへの指示を4つのレイヤーに分けた｜VANNAN GAMES 制作ノート VANNAN GAMES · Japanese | Devlog | Sep 17, 2026 | Nov 3, 2026 |
| VANNAN GAMESについて｜運営者情報 VANNAN GAMES · Japanese | Official site | Not confirmed | Nov 3, 2026 |
| Official game page (language check) VANNAN GAMES | Official site | Not confirmed | Nov 3, 2026 |
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